style text to center, larger and gray
Add letters each with their own class

  * Will not be possible to change individual letters
    if they are all in a single paragraph
  * To change individual letters, each must be its own
    span with its own class
  * Had to split the text upon init
  * Once split, renderLetter is called for each letter
  * renderLetter takes the letter and its position in the
    letters array and builds a span out of it
Show progress as type through game

  * Darkens letters as they are correctly typed
  * Resets text when game is won.
Merge pull request #5 from mknudsen01/show-progress

Show progress